Water purification system, control method of water purification system and water purification equipment

Abstract

The invention relates to the technical field of water purification equipment, in particular to a water purification system, a control method of the water purification system and the water purification equipment. The zero-stale-water water purification system comprises a water path system and an electric control system, the water path system comprises a reverse osmosis filter element, a main water path and a pure water path, and the main water path is connected with the raw water end of the reverse osmosis filter element; the pure water path is connected with the pure water end of the reverse osmosis filter element, a supercharging device located on the upstream side of the reverse osmosis filter element is arranged in the main water path, a backwashing loop is further arranged between the main water path and the pure water path, the backwashing loop is connected with a pure water container, and the pure water path is provided with a pressure detection device used for detecting the water outlet pressure of the pure water path; the electric control system is electrically connected with the supercharging device and the pressure detection device, a voltage regulating circuit acting on the supercharging device is arranged in the electric control system, and the pressure detection device detects the water outlet pressure of the pure water path so as to trigger the voltage regulating circuit to regulate the output voltage of the supercharging device; the output voltage of the supercharging device is reduced, and the purposes of vibration and noise reduction are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification equipment, and particularly relates to a water purification system, a control method of the water purification system, and a water purification device. Background Art

[0002] Existing water purifiers can not only directly prepare pure water for users, but also perform pure water backflow to bubble the membrane before preparing pure water to backwash the reverse osmosis filter element to reduce the TDS value of the first glass of water; and when the water purifier does not discharge water or the water discharge flow rate is small, the water purifier uses pure water backflow to backwash the reverse osmosis filter element, and the booster pump still operates at the rated power when preparing pure water. Under the rated voltage, the motor speed of the booster pump is relatively high, resulting in an increase in the vibration amplitude of the booster pump and generating a relatively large noise.

[0003] The present invention is studied and proposed in view of the deficiencies of the existing technology. Summary of the Invention

[0004] In view of the problem that when the water purifier does not discharge water or the water discharge flow rate is small, the water purifier uses pure water backflow to backwash the reverse osmosis filter element, and the booster pump still operates at the rated power when preparing pure water. Under the rated voltage, the motor speed of the booster pump is relatively high, resulting in an increase in the vibration amplitude of the booster pump and generating a relatively large noise, the present invention provides a water purification system, a control method of the water purification system, and a water purification device.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A water purification system, comprising: A water circuit system, the water circuit system includes a reverse osmosis filter element, a main water circuit connected to the raw water end of the reverse osmosis filter element, and a pure water circuit connected to the pure water end of the reverse osmosis filter element. A booster device is provided on the main water circuit upstream of the reverse osmosis filter element. An anti-backwash circuit is further provided between the main water circuit and the pure water circuit. The connection point of the anti-backwash circuit in the main water circuit is located upstream of the booster device, and the connection point of the anti-backwash circuit in the pure water circuit is located downstream of the pure water end of the reverse osmosis filter element. The anti-backwash circuit is further connected to a pure water container. A pressure detection device is provided on the pure water circuit, and the pressure detection device is used to detect the water outlet pressure of the pure water circuit; An electronic control system, the electronic control system is electrically connected to the booster device and the pressure detection device, and a voltage regulating circuit acting on the booster device is configured in the electronic control system, and the output voltage of the booster device is regulated through the voltage regulating circuit.

[0006] A water purification system as described above, wherein the electronic control system includes a power input module, a main control board, and a step-down transfer board electrically connected between the power input module and the main control board. The voltage regulation circuit is integrated on the step-down transfer board. The main control board obtains the outlet pressure of the pure water waterway through the pressure detection device, and triggers the step-down transfer board to adjust the output voltage of the booster device according to the outlet pressure. The first input end of the main control board is connected to the first output end of the step-down transfer board for receiving the first signal of the step-down transfer board. The first output end of the main control board is connected to the first input end of the booster device for outputting a first working voltage to the booster device. The second input end of the main control board is connected to the second output end of the step-down transfer board for receiving the second signal of the step-down transfer board. The second output end of the main control board is connected to the second input end of the booster device for outputting a second working voltage to the booster device.

[0007] A water purification system as described above, wherein the backwash circuit includes a return waterway connected to the main waterway and a makeup waterway connected to the pure water waterway. The return waterway and the makeup waterway converge to form a main backwash path, and the main backwash path is connected to the pure water container. A first one-way valve and a return valve are provided in the return waterway. The first one-way valve is used to unidirectionally guide the liquid from the pure water container to the main waterway, and the return valve is electrically connected to the electronic control system.

[0008] A water purification system as described above, wherein the main waterway includes a connected inlet waterway and a purified water waterway. The waterway system further includes a water storage container, a pre-filter, and an inlet valve provided in the inlet waterway. The pure water container is provided in the water storage container and elastically deforms under force. The pre-filter and the inlet valve are adjacent to each other between the water storage container and the booster device. The purified water waterway is formed between the pre-filter and the reverse osmosis filter, and the inlet valve is electrically connected to the electronic control system.

[0009] A water purification system as described above, wherein the waterway system further includes a drainage circuit connected to the drainage end of the reverse osmosis filter. The drainage circuit includes a first drainage waterway, a second drainage waterway and a third drainage waterway connected to the first drainage waterway. The second drainage waterway is used for discharging waste water, and the third drainage waterway communicates with the water storage container. A water quality detector is provided in the water storage container. A first drainage valve is provided in the second drainage waterway, and a second one-way valve is provided in the third drainage waterway. The second one-way valve is used to unidirectionally guide the liquid from the first drainage waterway to the third drainage waterway. A second drainage valve is provided in the first drainage waterway, and the second drainage valve, the first drainage valve and the water quality detector are electrically connected to the electronic control system.

[0010] A water purification system as described above, wherein a third one-way valve is provided in the pure water waterway on the upstream side of the pressure detection device, and the third one-way valve is used to conduct the water in the pure water waterway unidirectionally to the pressure detection device. The pure water waterway is further provided with a high-pressure switch electrically connected to the electronic control system; the high-pressure switch and the pressure detection device are integrally arranged; or, the high-pressure switch and the pressure detection device are adjacently arranged in the pure water waterway.

[0011] The present invention also provides a control method for a water purification system. The control method for the water purification system is implemented by the water purification system as described above. The control method for the water purification system includes: Obtain the outlet pressure of the pure water waterway; Determine the operation mode of the water purification system based on the outlet pressure of the pure water waterway; Determine the output voltage of the booster device based on the operation mode of the water purification system.

[0012] A control method for a water purification system as described above, wherein the operation mode of the water purification system at least includes a water production mode for producing water and a backwashing mode for flushing the reverse osmosis filter element. The specific process of determining the operation mode of the water purification system based on the outlet pressure of the pure water waterway includes: When the outlet pressure of the pure water waterway is obtained and the outlet pressure of the pure water waterway is less than the preset pressure threshold, the water purification system operates in the water production mode, and the booster device outputs the first working voltage; When the outlet pressure of the pure water waterway is obtained and the outlet pressure of the pure water waterway is greater than the preset pressure threshold, the water purification system operates in the backwashing mode, and the booster device outputs the second working voltage.

[0013] A control method for a water purification system as described above, wherein the second working voltage is 50% - 85% of the first working voltage.

[0014] The present invention also provides a water purification device, including the water purification system as described above.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The water outlet pressure of the pure water waterway is detected in real time by a pressure detection device, and the measured water outlet pressure signal is transmitted to an electronic control system. The electronic control system compares the water outlet pressure signal received from the pressure detection device with a preset pressure threshold, and triggers a voltage regulating circuit to output a first working voltage or a second working voltage to a booster device according to the comparison result of the measured water outlet pressure signal and the preset pressure threshold, so that the booster device outputs the first working voltage or the second working voltage accordingly; realizing the voltage regulation of the booster device, which is beneficial to reducing the output voltage of the booster device, thereby reducing the operating power of the booster device, reducing the vibration of the motor in the booster device, and achieving the purpose of vibration reduction and noise reduction.

[0016] The present invention will be further described below in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the waterway system of the present invention; Figure 2 is a schematic diagram of the electronic control system of the present invention; Figure 3 is a circuit structure diagram of one embodiment of the electronic control system of the present invention; Figure 4 is a schematic diagram of the waterway system of the present invention in the pure water production mode; Figure 5 is a schematic diagram of the waterway system of the present invention in the water replenishment mode; Figure 6 is a schematic diagram of the waterway system of the present invention in the backwashing mode; Figure 7 is a flowchart of the control method of the water purification system of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The embodiments of the present invention will be described in detail below in conjunction with the drawings. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0020] In addition, the descriptions involving "first", "second", etc. in the present invention are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] The present invention provides a water purification device, and the water purification device is configured with a water purification system, such as Figure 1As shown in FIGS. 1-6, the water purification system includes a water circuit system 100 and an electric control system 200. The water circuit system 100 includes a reverse osmosis filter element 110, a main water circuit, and a pure water circuit 130. The reverse osmosis filter element 110 includes a raw water end, a pure water end, and a drainage end. The main water circuit is connected to the raw water end of the reverse osmosis filter element 110 to input water to the reverse osmosis filter element 110. The pure water circuit 130 is connected to the pure water end of the reverse osmosis filter element 110 to output pure water to the outside. A pressurizing device 121 is provided in the main water circuit on the upstream side of the reverse osmosis filter element 110. An anti-flushing circuit is also provided between the main water circuit and the pure water circuit 130. The connection point of the anti-flushing circuit in the main water circuit is on the upstream side of the pressurizing device 121, and the connection point of the anti-flushing circuit in the pure water circuit 130 is on the downstream side of the pure water end of the reverse osmosis filter element 110. The anti-flushing circuit is connected to a pure water container 150. The pure water in the pure water circuit 130 can be directly output for users to use, or the pure water can flow through the anti-flushing circuit to the pure water container 150. The pure water in the pure water container 150 can flow back to the reverse osmosis filter element 110 through the anti-flushing circuit for anti-flushing, so as to perform pure water soaking film on the reverse osmosis filter element 110 to reduce the TDS value of the first glass of water and achieve zero standing water and zero wastewater in the water purification system; a pressure detection device 131 is provided in the pure water circuit 130, and the pressure detection device 131 is arranged on the downstream side of the pure water end of the reverse osmosis filter element 110 for detecting the water outlet pressure of the pure water circuit 130; the electric control system 200 is electrically connected to the pressurizing device 121 and the pressure detection device 131. A voltage regulating circuit acting on the pressurizing device 121 is configured in the electric control system 200. The water outlet pressure of the pure water circuit 130 is detected by the pressure detection device 131 to trigger the voltage regulating circuit to adjust the output voltage of the pressurizing device 121; the pressure detection device 131 continuously detects the water outlet pressure of the pure water circuit 130 and feeds back the measured water outlet pressure signal to the electric control system 200. The electric control system 200 compares the water outlet pressure signal received from the pressure detection device 131 with a preset pressure threshold, and triggers the voltage regulating circuit to output a first working voltage or a second working voltage to the pressurizing device 121 according to the comparison result of the measured water outlet pressure signal and the preset pressure threshold, so that the pressurizing device 121 outputs the first working voltage or the second working voltage accordingly; if the water outlet pressure is less than the preset pressure threshold, the voltage regulating circuit controls the pressurizing device 121 to output a first working voltage; if the water outlet pressure is greater than the preset pressure threshold, the voltage regulating circuit controls the pressurizing device 121 to output a second working voltage, and the second working voltage is less than the first working voltage;Implement voltage regulation for the booster device 121 to facilitate reducing the output voltage of the booster device 121, thereby reducing the operating power of the booster device 121, minimizing the vibration of the motor in the booster device 121, and achieving the purpose of vibration reduction and noise reduction.

[0022] Optionally, the booster device 121 can adopt an existing booster pump.

[0023] As Figure 2 and Figure 3 As shown, the electronic control system 200 includes a power input module 210, a main control board 220, and a step-down adapter board 230 electrically connected between the power input module 210 and the main control board 220. The voltage regulation circuit is integrated on the step-down adapter board 230. The main control board 220 obtains the outlet water pressure of the pure water waterway 130 through the pressure detection device 131, and triggers the step-down adapter board 230 to adjust the output voltage of the booster device 121 according to the outlet water pressure. Further, the first input terminal 221 of the main control board is connected to the first output terminal 231 of the step-down adapter board for receiving the first signal of the step-down adapter board 230. The first output terminal 223 of the main control board is connected to the first input terminal 1211 of the booster device for outputting a first operating voltage to the booster device 121. The second input terminal 222 of the main control board is connected to the second output terminal 232 of the step-down adapter board for receiving the second signal of the step-down adapter board 230. The second output terminal 224 of the main control board is connected to the second input terminal 1212 of the booster device for outputting a second operating voltage to the booster device 121. In practical applications, there is a communication connection between the main control board 220 and the step-down adapter board 230. The main control board 220 obtains the outlet water pressure of the pure water waterway 130 measured by the pressure detection device 131, and compares the measured outlet water pressure with a preset pressure threshold to obtain a comparison result. If the measured outlet water pressure is less than the preset pressure threshold, the main control board 220 is triggered to send a non-step-down instruction to the step-down adapter board 230. The step-down adapter board 230 sends a first signal for outputting the first operating voltage (i.e., the rated voltage of the booster device 121) to the main control board 220. After receiving this first signal, the main control board 220 outputs the first operating voltage to the booster device 121. If the measured outlet water pressure is greater than the preset pressure threshold, the main control board 220 is triggered to send a step-down instruction to the step-down adapter board 230. The step-down adapter board 230 sends a second signal for outputting the second operating voltage to the main control board 220. After receiving this second signal, the main control board 220 outputs the second operating voltage to the booster device 121.

[0024] Optionally, the pressure detection device 131 may adopt an existing pressure sensor, and the main control board 220 and the step-down adapter board 230 may adopt existing integrated circuit boards, which will not be elaborated here.

[0025] In some other alternative embodiments, the power input module 210 includes a power adapter 211. The power adapter 211 is connected in series with the step-down adapter board 230, and the main control board 220 is connected in series with the step-down adapter board 230. Moreover, the main control board 220 is connected to the neutral wire of the power input module 210 to protect the electric control system 200. In practical applications, the home circuit or 220V AC circuit can be accessed through the power adapter 211 to provide power for the electric control system 200.

[0026] On the other hand, as shown in Figure 1 , 5 , 6, the backwash circuit includes a return water path 141 connected to the main water path and a make-up water path 142 connected to the pure water path 130. The return water path 141 and the make-up water path 142 converge to form a main backwash path 143. The main backwash path 143 is connected to the pure water container 150. A first one-way valve 144 and a return valve 145 are provided in the return water path 141. The first one-way valve 144 is used to unidirectionally guide the liquid from the pure water container 150 to the main water path. The return valve 145 is electrically connected to the electric control system 200, and the on / off of the return water path 141 is controlled through the return valve 145. In practical applications, the pure water in the pure water path 130 can flow into the pure water container 150 through the make-up water path 142 for storage. When the return valve 145 is opened and the booster device 121 operates at the second working voltage, the pure water in the pure water container 150 is pumped to the reverse osmosis filter element 110 along the main backwash path 143 and the return water path 141, and the reverse flow of pure water is restricted by the first one-way valve 144 to ensure that the reverse osmosis filter element 110 can normally perform pure water soaking film to reduce the TDS value of the first glass of water.

[0027] In some other alternative embodiments, as shown in Figure 1 and Figure 4As shown in the figure, the main water circuit includes a connected inlet water circuit 120 and a purified water circuit 170. The water circuit system 100 further includes a water storage container 160, a pre-filter 122, and a water inlet valve 123 provided in the inlet water circuit 120. The water storage container 160 is connected to the inlet water circuit 120 and can pre-store raw water to facilitate improving the efficiency of raw water input into the water circuit system 100. The pre-filter 122 and the water inlet valve 123 are adjacently arranged between the water storage container 160 and the pressurizing device 121. A purified water circuit 170 is formed between the pre-filter 122 and the reverse osmosis filter 110. The water inlet valve 123 is electrically connected to the electronic control system 200, and the water inlet valve 123 is used to control the on-off of the inlet water circuit 120. In actual application, when the purified water system normally produces pure water, the electronic control system 200 controls the water inlet valve 123 to open, and the pressurizing device 121 operates at the first working voltage, so that the raw water flows along the inlet water circuit 120 through the pre-filter 122 for primary filtration, and the purified water circuit 170 is formed between the water outlet end of the pre-filter 122 and the raw water end of the reverse osmosis filter 110. The purified water formed by the primary filtration of the pre-filter 122 is guided to the reverse osmosis filter 110 through the purified water circuit 170 for secondary filtration to facilitate the preparation of pure water meeting the drinking standard. Optionally, the pre-filter 122 can be a PP cotton filter, an activated carbon filter, a composite filter, etc. The water inlet valve 123 can be a pressure reducing valve or a solenoid valve.

[0028] As Figure 1 shown in the figure, the pure water container 150 is provided in the water storage container 160, and the pure water container 150 is stressed and undergoes elastic deformation. The pure water container 150 can be set as an elastic water bag, and the elastic water bag undergoes elastic deformation due to the change in water pressure inside and outside. The water bag elastically expands as the water storage volume increases, and through its own elastic action and the extraction action of the pressurizing device 121, the pure water inside is supplied to the backflow water circuit 141. At the same time, the elastic water bag can be contracted and deformed under the water pressure in the water storage container 160 to further increase the water pressure in the backflow water circuit 141 and increase the backflow flow rate of the pure water.

[0029] As Figure 1 and Figure 4As shown, the water circuit system 100 further includes a drainage circuit connected to the drainage end of the reverse osmosis filter element 110. The drainage circuit includes a first drainage water path 181, a second drainage water path 182 connected to the first drainage water path 181, and a third drainage water path 183. The second drainage water path 182 is used to discharge wastewater to the outside. The third drainage water path 183 communicates with the water storage container 160. A water quality detector 161 is provided in the water storage container 160. The water quality detector 161 is used to detect the TDS value of the raw water. A first drainage valve 185 is provided in the second drainage water path 182. The first drainage valve 185 is used to control the on-off of the second drainage water path 182. A second one-way valve 186 is provided in the third drainage water path 183. The second one-way valve 186 is used to conduct liquid from the first drainage water path 181 to the third drainage water path 183 unidirectionally. The first drainage valve 185 and the water quality detector 161 are electrically connected to the electronic control system 200. In practical applications, the drainage end of the reverse osmosis filter element 110 discharges wastewater to the first drainage water path 181. When the first drainage valve 185 is opened, the wastewater can be discharged through the second drainage water path 182. When the first drainage valve 185 is closed, the wastewater can be unidirectionally conducted to the water storage container 160 through the third drainage water path 183, realizing wastewater recovery. After the wastewater is mixed with the raw water, it is input into the pre-filter element 122 again through the water inlet path 120 for re-filtration to improve water utilization rate. In addition, the TDS value of the water in the water storage container 160 can be detected in real time through the water quality detector 161. When the detected TDS value of the water in the water storage container 160 is too high, a signal is fed back to the electronic control system 200, and the electronic control system 200 controls the first drainage valve 185 to open to discharge wastewater. Optionally, the first drainage valve 185 can be an electromagnetic valve.

[0030] Further, a second drainage valve 184 is provided in the first drainage water path 181. The second drainage valve 184 is electrically connected to the electronic control system 200. The second drainage valve 184 can be an electromagnetic valve or a wastewater ratio / proportion valve, and is used to control the drainage flux of the first drainage water path 181.

[0031] Further optionally, to simplify the water circuit, the third drainage water path 183 is connected to the water inlet path 120, and the connection point of the third drainage water path 183 in the water inlet path 120 is located on the upstream side of the water storage container 160.

[0032] In some other embodiments, such as Figure 1As shown, a third one-way valve 132 is provided in the pure water waterway 130 on the upstream side of the pressure detection device 131. The third one-way valve 132 is used to conduct the water in the pure water waterway 130 unidirectionally to the pressure detection device 131. The pure water waterway 130 is further provided with a high-pressure switch 133 electrically connected to the electronic control system 200. The high-pressure switch 133 is used to control the opening and closing of the pressurization device 121. In practical applications, when the pressure detection device 131 detects that the outlet water pressure is less than the preset pressure threshold, the electronic control system 200 triggers the high-pressure switch 133 to close, thereby triggering the pressurization device 121 to start, and realizing the normal production of pure water by the water purification system. When the pressure detection device 131 detects that the outlet water pressure is greater than the preset pressure threshold, the electronic control system 200 triggers the high-pressure switch 133 to disconnect, thereby triggering the pressurization device 121 to close, and the water purification system is in a shutdown state.

[0033] Optionally, the high-pressure switch 133 and the pressure detection device 131 are integrally arranged; or, the high-pressure switch 133 and the pressure detection device 131 are independently arranged, and the high-pressure switch 133 is located on the downstream side of the pressure detection device 131.

[0034] In practical applications, a water intake switch 300 can be provided in the pure water waterway 130 on the downstream side of the pressure detection device 131. The water intake switch 300 is used to adjust the outlet water pressure of the pure water waterway 130. Based on the above water purification system, the water purification system has at least the following operating modes: Pure water production mode: As Figure 4 shown, open the water intake switch 300, the pressure in the pure water waterway 130 drops, the outlet water pressure measured by the pressure detection device 131 is less than the preset pressure threshold, the high-pressure switch 133 closes, and the electronic control system 200 controls the pressurization device 121 to operate at the first working voltage (such as 24V). At the same time, the inlet valve 123 is opened, and the pressurization device 121 is used to extract raw water from the water storage container 160, so that the raw water is filtered through the pre-filter element 122 and the reverse osmosis filter element 110 in sequence to produce pure water. The pure water is discharged from the water intake switch 300 through the pure water waterway 130 for users to use. The second drain valve 184 and the first drain valve 185 are opened, and the waste water can be discharged through the first drain waterway 181 and the second drain waterway 182. It should be noted that the preset pressure threshold can be set according to the water pressure required for outputting pure water when the water purification system is in the pure water production mode.

[0035] Make-up water mode: As Figure 5As shown, close the water intake switch 300, open the water inlet valve 123, the pressure in the pure water waterway 130 rises, the outlet water pressure measured by the pressure detection device 131 is greater than the preset pressure threshold, and the outlet water pressure measured by the pressure detection device 131 is less than the disconnection pressure threshold of the high-pressure switch 133. The high-pressure switch 133 remains closed, and the electronic control system 200 controls the booster device 121 to operate at the second working voltage (such as 16V). The pure water flows through the make-up water waterway 142 into the pure water container 150 until a continuous fixed time or the pure water container 150 is filled. After the make-up water is completed, close the water inlet valve 123 and the booster device 121.

[0036] If it is measured that the outlet water pressure measured by the pressure detection device 131 reaches the disconnection pressure threshold of the high-pressure switch 133, the high-pressure switch 133 disconnects to close the booster device 121, thereby protecting the water purification system.

[0037] Backwashing mode: As Figure 6 shown, after the make-up water is completed, the water purification system can be switched to the backwashing mode. Keep the water intake switch 300 closed, close the water inlet valve 123, open the booster device 121 and the return valve 145 for a fixed time. The booster device 121 operates at the second working voltage. The pure water in the pure water container 150 flows back to the reverse osmosis filter element 110 through the main backwashing path 143, the return water path 141 and the water inlet path 120 in sequence to realize the pure water reflux bubble film and reduce the TDS value of the first glass of water. At the same time, since the booster device 121 operates at the second working voltage, it is beneficial to reduce noise when the water purification system is in the make-up water mode and the backwashing mode.

[0038] In addition, the pure water container 150 is set as an elastic water bag and is located in the water storage container 160. When the water purification system is in the backwashing mode, the elastic water bag is further compressed and deformed by the water pressure in the water storage container 160 to increase the pure water reflux pressure and water flow rate in the main backwashing path 143. While the booster device 121 operates at a relatively low second working voltage, the flushing effect of the pure water reflux on the reverse osmosis filter element 110 is improved, achieving the purpose of reducing the TDS value of the first glass of water.

[0039] Wastewater recovery mode: As Figure 4 shown, close the first drain valve 185, open the second drain valve 184, and the wastewater output from the drain end of the reverse osmosis filter element 110 is unidirectionally guided to the water storage container 160 through the first drain water path 181 and the third drain water path 183 in sequence.

[0040] On the other hand, as Figure 7As shown, the present invention also provides a control method for a water purification system, which is implemented by the above water purification system. The control method of the water purification system includes: Obtain the outlet pressure of the pure water waterway 130; Specifically, a pressure detection device 131 is provided in the pure water waterway 130. The outlet pressure of the pure water waterway 130 is detected in real time by the pressure detection device 131, and the measured outlet pressure signal is fed back to the electric control system 200.

[0041] Determine the operating mode of the water purification system based on the outlet pressure of the pure water waterway 130; Specifically, the electric control system 200 compares the outlet pressure signal received from the pressure detection device 131 with a preset pressure threshold, and determines the operating mode of the water purification system according to the comparison result between the measured outlet pressure signal and the preset pressure threshold.

[0042] Determine the output voltage of the booster device 121 based on the operating mode of the water purification system; Specifically, the water purification system at least includes a water production mode for producing water and a backwashing mode for flushing the reverse osmosis filter element. When the outlet pressure of the pure water waterway 130 is measured to be less than the preset pressure threshold, the water purification system operates in the water production mode to prepare pure water for user use. At this time, the electric control system 200 controls the booster device 121 to output a first working voltage, which is preferably the rated voltage of the booster device 121, which is beneficial to increasing the inlet pressure of the reverse osmosis filter element 110 and further improving the efficiency of pure water production. When the outlet pressure of the pure water waterway 130 is measured to be greater than the preset pressure threshold, the water purification system operates in the backwashing mode, and the pure water is used to flow back into the reverse osmosis filter element 110 for backwashing to facilitate reducing the TDS value of the first glass of water. The backwashing mode is mostly used before the water purification system is restarted. During the backwashing mode, the water purification system is in a state of not discharging water. At this time, the electric control system 200 controls the booster device 121 to output a second working voltage, and the second working voltage is less than the first working voltage. By reducing the output voltage of the booster device 121 to reduce its output power, it is beneficial to reduce the motor vibration of the booster device 121 and achieve the purpose of vibration reduction and noise reduction. Especially at night or in a quiet environment, noise reduction is achieved by reducing the operating power of the booster device 121, which can optimize the user experience, and can also reduce the energy consumption of the water purification system and save more electricity.

[0043] As an alternative embodiment of the present invention, the operating modes of the water purification system at least include a water production mode and a backwashing mode. The water production mode is used to produce pure water, and the backwashing mode is used to make the pure water flow back to backwash the reverse osmosis filter element 110. The determination of the operating mode of the water purification system based on the outlet pressure of the pure water waterway 130 specifically includes: When a start signal of the water purification system is obtained and the outlet pressure of the pure water waterway is less than a preset pressure threshold, the water purification system operates in the water production mode, and the booster device outputs a first operating voltage; For example, a water intake switch 300 is provided in the pure water waterway. The water intake switch 300 is electrically connected to the electronic control system 200. When the water intake switch 300 is turned on, the electronic control system 200 receives the start signal of the water intake switch 300 and controls the water purification system to operate in the water production mode to filter raw water and produce potable pure water. At the same time, the pressure in the pure water waterway 130 gradually decreases. The main control board 220 obtains the outlet pressure of the pure water waterway 130 measured from the pressure detection device 131 and compares the measured outlet pressure with the preset pressure threshold to obtain a comparison result of "the measured outlet pressure is less than the preset pressure threshold", then triggers the main control board 220 to send a non-pressure-reducing instruction to the step-down transfer board 230. The step-down transfer board 230 sends a first signal for outputting the first operating voltage (i.e., the rated voltage of the booster device 121) to the main control board 220. After receiving this first signal, the main control board 220 outputs the first operating voltage to the booster device 121. It should be noted that the start signal of the water intake switch 300 is the start signal of the water purification system.

[0044] When a shutdown signal of the water purification system is obtained and the outlet pressure of the outlet waterway is greater than a preset pressure threshold, the water purification system operates in the backwashing mode, and the booster device outputs a second operating voltage; For example, when the water intake switch 300 is closed, the electric control system 200 receives the closing signal of the water intake switch 300, and controls the water purification system to run the backwash mode, so that the pure water flows back to the reverse osmosis filter element for backwashing, thereby reducing the TDS value of the first cup of water, and at the same time, the pressure in the pure water waterway 130 gradually rises, and the main control board 220 obtains the outlet water pressure of the pure water waterway 130 measured from the pressure detection device 131, and the measured outlet water pressure is greater than the preset pressure threshold, then the main control board 220 is triggered to send a pressure reduction instruction to the step-down adapter board 230, and the step-down adapter board 230 sends a second signal for outputting the second working voltage to the main control board 220. After receiving the second signal, the main control board 220 outputs the second working voltage to the boosting device 121. It should be noted that the closing signal of the water intake switch 300 is the closing signal of the water purification system.

[0045] As some other optional embodiments of the present invention, the operation mode of the water purification system also includes a water replenishment mode, by preparing a small amount of pure water and storing the pure water in the pure water container 150 for standby use, when switching to the backwash mode, the pure water is directly pumped from the pure water container 150 to the reverse osmosis filter element 110 through the booster device 121 for backwashing, so as to improve the backwashing efficiency of the reverse osmosis filter element 110, thereby improving the pure water production efficiency after the water purification system is restarted, and avoiding the TDS value of the first cup of water being too high; specifically, when the shutdown signal of the water purification system is obtained and the outlet water pressure of the pure water waterway is greater than the preset pressure threshold, it also includes: The water purification system operates in a water replenishment mode, and the booster device outputs a second working voltage; Specifically, when the water purification system operates in the replenishment mode, the electronic control system 200 receives a shutdown signal of the water purification system, and controls the water purification system to operate in the replenishment mode, prepares a small amount of pure water according to the water preparation mode, and transports the prepared pure water to the pure water container 150. At the same time, the pressure in the pure water waterway 130 gradually increases, and the main control board 220 obtains the outlet water pressure of the pure water waterway 130 measured from the pressure detection device 131. If the measured outlet water pressure is greater than a preset pressure threshold, the main control board 220 is triggered to send a pressure reduction instruction to the step-down adapter board 230. The step-down adapter board 230 sends a second signal for outputting the second working voltage to the main control board 220. After receiving the second signal, the main control board 220 outputs the second working voltage to the boost device 121.

[0046] After the water purification system operates continuously in the water replenishment mode for a fixed time or produces a fixed amount of pure water, the water purification system switches to the backwashing mode. The pressurization device 131 maintains the output of the second working voltage, so that the pressurization device 131 operates at a low voltage in both the water replenishment mode and the backwashing mode, which is beneficial to reducing noise and energy consumption.

[0047] In one embodiment, the fixed amount of pure water can be set according to the capacity of the pure water container 150, and the water storage amount in the pure water container 150 is detected in real time. If the water storage amount reaches the set value, it means that the pure water container 150 is full of water. At this time, the water inlet valve 123 can be controlled to close through the electronic control system 200, and the water purification system is switched to the backwashing mode. And in the backwashing mode, the pressurization device 121 operates at the second working voltage; optionally, a liquid level sensor can be arranged in the pure water container 150 to detect the water storage amount in the pure water container 150, and the liquid level sensor is electrically connected to the electronic control system 200 to feedback the water storage condition in the pure water container 150 to the electronic control system 200 in real time.

[0048] As some optional embodiments of the present invention, in practical applications, the first working voltage can be the rated voltage of the pressurization device 121, and the second working voltage can be 50% - 85% of the first working voltage. While reducing voltage and noise, it ensures the normal operation of the pressurization device 121 and enables the voltage regulating circuit to be adapted to a variety of pressurization devices 121 for use; optionally, the second working voltage can be set to one of 50%, 60%, 70%, 80%, 85% of the first working voltage; further optionally, the second working voltage can be 50% - 80% of the first working voltage.

[0049] The above only uses embodiments to further illustrate the technical content of the present invention to make it easier for readers to understand, but it does not mean that the implementation manners of the present invention are limited to this. Any technical extension or re - creation based on the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. A water purification system, characterized in that, Comprising: A waterway system (100), the waterway system (100) includes a reverse osmosis filter element (110), a main waterway connected to the raw water end of the reverse osmosis filter element (110), and a pure water waterway (130) connected to the pure water end of the reverse osmosis filter element (110). A pressurizing device (121) is provided in the main waterway on the upstream side of the reverse osmosis filter element (110). There is also an anti-flushing circuit between the main waterway and the pure water waterway (130). The connection point of the anti-flushing circuit in the main waterway is on the upstream side of the pressurizing device (121), and the connection point of the anti-flushing circuit in the pure water waterway (130) is on the downstream side of the pure water end of the reverse osmosis filter element (110). The anti-flushing circuit is also connected to a pure water container (150). The pure water waterway (130) is provided with a pressure detection device (131), and the pressure detection device (131) is used to detect the water outlet pressure of the pure water waterway (130); An electric control system (200), the electric control system (200) is electrically connected to the pressurizing device (121) and the pressure detection device (131). A voltage regulating circuit acting on the pressurizing device (121) is configured in the electric control system (200), and the output voltage of the pressurizing device is regulated through the voltage regulating circuit.

2. The water purification system according to claim 1, wherein The electric control system (200) includes a power input module (210), a main control board (220), and a step-down transfer board (230) electrically connected between the power input module (210) and the main control board (220). The voltage regulating circuit is integrated on the step-down transfer board (230). The main control board (220) obtains the water outlet pressure of the pure water waterway (130) through the pressure detection device (131), and triggers the step-down transfer board (230) to adjust the output voltage of the pressurizing device (121) according to the water outlet pressure; The first input end (221) of the main control board is connected to the first output end (231) of the step-down transfer board for receiving the first signal of the step-down transfer board (230); The first output end (223) of the main control board is connected to the first input end (1211) of the pressurizing device for outputting a first working voltage to the pressurizing device (121); The second input end (222) of the main control board is connected to the second output end (232) of the step-down transfer board for receiving the second signal of the step-down transfer board (230); The second output end (224) of the main control board is connected to the second input end (1212) of the pressurizing device for outputting a second working voltage to the pressurizing device (121).

3. The water purification system according to claim 1, characterized in that, The backwash circuit includes a return water path (141) connected to the main water path, and a make-up water path (142) connected to the pure water path (130). The return water path (141) and the make-up water path (142) converge to form a main backwash path (143). The main backwash path (143) is connected to the pure water container (150). A first one-way valve (144) and a return valve (145) are provided in the return water path (141). The first one-way valve (144) is used to conduct liquid unidirectionally from the pure water container (150) to the main water path. The return valve (145) is electrically connected to the electronic control system (200).

4. A water purification system according to claim 1, characterized in that, The main water path includes a connected intake water path (120) and a purified water path (171). The water path system (100) further includes a water storage container (160), a pre-filter (122), and an intake valve (123) provided in the intake water path (120). The pure water container (150) is arranged inside the water storage container (160), and the pure water container (150) undergoes elastic deformation under force. The pre-filter (122) and the intake valve (123) are arranged adjacent to each other between the water storage container (160) and the pressurizing device (121). The purified water path (171) is formed between the pre-filter (122) and the reverse osmosis filter (110). The intake valve (123) is electrically connected to the electronic control system (200).

5. A water purification system according to claim 4, characterized in that The water path system (100) further includes a drainage circuit connected to the drainage end of the reverse osmosis filter (110). The drainage circuit includes a first drainage water path (181), a second drainage water path (182) connected to the first drainage water path (181), and a third drainage water path (183). The second drainage water path (182) is used to drain wastewater. The third drainage water path (183) communicates with the water storage container (160). A water quality detector (161) is arranged inside the water storage container (160). A first drainage valve (185) is provided in the second drainage water path (182). A second one-way valve (186) is provided in the third drainage water path (183). The second one-way valve (186) is used to conduct liquid unidirectionally from the first drainage water path (181) into the third drainage water path (183). A second drainage valve (184) is provided in the first drainage water path (181). The second drainage valve (184), the first drainage valve (185), and the water quality detector (161) are electrically connected to the electronic control system (200).

6. A water purification system according to claim 1, characterized in that, A third one-way valve (132) is provided in the pure water path (130) on the upstream side of the pressure detection device (131). The third one-way valve (132) is used to conduct the water in the pure water path (130) unidirectionally to the pressure detection device (131). The pure water path (130) is further provided with a high-pressure switch (133) electrically connected to the electronic control system (200). The high-pressure switch (133) and the pressure detection device (131) are integrally arranged. Alternatively, the high-pressure switch (133) is disposed adjacent to the pressure detection device (131) in the pure water waterway (130).

7. A control method for a water purification system, characterized in that, The control method of the water purification system is implemented by the water purification system according to any one of claims 1-6 above. The control method of the water purification system includes: Obtaining the outlet pressure of the pure water waterway (130); Determining the operation mode of the water purification system based on the outlet pressure of the pure water waterway (130); Determining the output voltage of the booster device (121) based on the operation mode of the water purification system.

8. The control method of a water purification system according to claim 7, characterized in that, The operation mode of the water purification system at least includes a water production mode for producing water and a backwashing mode for flushing the reverse osmosis filter element. The specific method of determining the operation mode of the water purification system based on the outlet pressure of the pure water waterway includes: When the outlet pressure of the pure water waterway (130) is obtained and the outlet pressure of the pure water waterway (130) is less than a preset pressure threshold, the water purification system operates in the water production mode, and the booster device (121) outputs a first working voltage; When the outlet pressure of the pure water waterway (130) is obtained and the outlet pressure of the pure water waterway (130) is greater than a preset pressure threshold, the water purification system operates in the backwashing mode, and the booster device (121) outputs a second working voltage.

9. The control method of a water purification system according to claim 8, characterized in that, The second working voltage is 50% to 85% of the first working voltage.

10. A water purification device, characterized in that, It includes the water purification system according to any one of claims 1-6.

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